package kr.hkit.powerjava.chapter04;

import java.util.Scanner;

public class CirecleArea {
	public static void main (String[] args) {

		double radius;
		double area;
		final double PI = 3.14;
		Scanner input = new Scanner(System.in);
		System.out.print("반지름을 입력하시오:");
		radius = input.nextDouble();
		area = PI * radius * radius; 
	    System.out.println(area);
		
	}
}
